B1985 Engine Trouble Code
What is B1985?
B1985 code can indicate a faulty oxygen sensor, which may eventually damage the catalytic converter (repair cost: $2,000–$2,200). Professional diagnosis costs around $200–$210. Oxygen sensors are often straightforward to replace — check your owner's manual for location and instructions. This issue should be addressed promptly to prevent further damage.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B1985 |
B1985 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
B1985 Code Structure
Understanding what each digit means in the B1985 body trouble code:
| B | 1 | 9 | 8 | 5 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering | Injector Circuit Malfunction - Cylinders | Ignition/Distributor Engine Speed Input Circuit Malfunction | Crankshaft Position Sensor B Circuit Malfunction |
How to Fix B1985
Diagnostic Steps:
Regarding B1985, carefully inspect the wire harness near the intake manifold bracket, best accessed from below near the oil filter. Look for chafing, pinching, or damaged insulation.
Repair Solution:
Verify all electrical connections are clean and tight. Check for damaged wiring, especially in high-heat or high-vibration areas. Use manufacturer wiring diagrams for accurate diagnosis.
Technical Notes:
B1985 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
B1985 Description
B1985 engine trouble code is related to Crankshaft Position Sensor B Circuit Malfunction.
Main Cause
The primary reason for B1985 OBD-II Engine Trouble Code is: Injector Circuit Malfunction - Cylinders.